Add HTTP Sink in depot

[jesrypandawa]

• Create HttpClient and related classes to include all the HTTP auth and HTTP methods.
• Implement a bare minimum HttpSink which sends data to the HTTP server.
• Add support for parsing of list data type in getFieldByName() method in ParsedOdpfMessage.
• getFieldByName() should return ParsedMessage instead of Object. ParsedMessage should contain more methods like getType(), isReapated(), isStruct(), isPrimitive() etc etc.
• Add ToJson() method to convert struct into JSON string in ParsedOdpfMessage class.
• Create HeaderBuilder class
• Create URI builder and QueryParam class
• Create Raw Payload builder
• Create Json Payload builder
• Create Message Payload Builder
• Create String Payload builder
• Create JsonTemplate Payload Builder
• Create RequestBuilder build() method for Single request
• Create RequestBuilder build() method for Batch request
• Create HttpRecordConverter
• Implement HttpRequestRecord and HttpResponseRecord classes to contain methods like logging based on configs.
• Add methods to parse the HttpResponseRecord to set correct ErrorTypes.
• Instrumentation: Add sink related metrics
• Documentation